to the blue cities? guess where it's happening? the battleground state of ohio. >>> but first up, vice president joe biden and paul ryan are cramming for their debate. you can watch coverage of the debate beginning tomorrow here on "the kudlow report." now, past debates have been must-see tv. this one is likely to be no different. cnbc's own john harwood joins us live from lexington, kentucky, with all the details. good evening, john. >> reporter: good evening, larry. you know, if presidential debates themselves usually don't matter much, and they don't, vice presidential debates almost never do, even though they're fun. but the stakes are higher for this debate tomorrow between paul ryan and vice president joe biden. ryan, of course, is a policy wonk. biden has the experience. but it's not going to be as friendly as this encounter four years ago between biden and sarah palin. >> no cheers, applaud, no untoward outbursts except right at this minute now as we welcome governor palin and senator biden. >> reporter: the reason this is going to be a different encounter is because of all the